How can I trace control commands from a Wahoo Kickr Core Smarttrainer?

Question

I am developing a Progressive Web App and would like to control an indoor bike smart trainer and read data from it. I want to achieve this through the Web Bluetooth API (BLE / FTMS). I have already successfully implemented reading speed, cadence, and power data.

Currently, I am struggling with setting a target power. The "Fitness Machine Control Point (0x2AD9)" characteristic is available, and I can write values to it. However, the problem is that I haven't found any documentation for it. I have already contacted Wahoo support, but unfortunately, I mostly get very brief responses that don't really answer my questions.

So, the question is: what options are there to identify the correct values in order to control the device?

Perhaps someone has experience with the FTMS - FITNESS MACHINE SERVICE protocol?

Risto · Accepted Answer · 2025-01-14 07:22:05Z

3

The Fitness Machine Profile and Fitness Machine Service are official specifications of the Bluetooth SIG.

answered Jan 14 at 7:22

Risto

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1 Comment

Chris81T Jan 14 at 22:05

Thanks for sharing. I had already skimmed through the Fitness Machine Service Specification, but with the yet unfamiliar Fitness Machine Profile Specification, I was able to get a better overview and successfully write the first data to the Wahoo Kickr Core.

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